*{
	margin: 0;
	padding: 0;
	list-style: none;
	text-decoration: none;
}

.web{
	width: 100%;
	.box{
		width: 50%;
		padding-top: 28.11%;
		background-color: red;
		position: absolute;
		top: 50%;
		left: 50%;
		transform: translate(-50%,-50%);
		ul{
			white-space: nowrap;
			font-size: 0;
			position: absolute;
			left: 0;
			top: 0;
			width: 100%;
			li{
				display: inline-block;
				a{
					display: block;
					img{
						width: 100%;
					}
				}
			}
		}
	}
}